From a952ea60a0da87692203946f250dfc17b3d6fedd Mon Sep 17 00:00:00 2001
From: tmadlener <thomas.madlener@desy.de>
Date: Mon, 12 Feb 2024 15:11:02 +0100
Subject: [PATCH] Move load_file to utils module to make it usable in user code

---
 k4FWCore/python/k4FWCore/utils.py | 30 ++++++++++++++++++++++++++++++
 k4FWCore/scripts/k4run            |  6 ++----
 2 files changed, 32 insertions(+), 4 deletions(-)
 create mode 100644 k4FWCore/python/k4FWCore/utils.py

diff --git a/k4FWCore/python/k4FWCore/utils.py b/k4FWCore/python/k4FWCore/utils.py
new file mode 100644
index 00000000..df03b754
--- /dev/null
+++ b/k4FWCore/python/k4FWCore/utils.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+#
+# Copyright (c) 2014-2024 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+from io import TextIOWrapper
+from typing import Union
+
+
+def load_file(opt_file: Union[TextIOWrapper, os.PathLike]) -> None:
+    """Load the file content and run it in the current interpreter session"""
+    if isinstance(opt_file, os.PathLike):
+        opt_file = open(opt_file, "r")
+    code = compile(opt_file.read(), opt_file.name, "exec")
+    exec(code, globals())
diff --git a/k4FWCore/scripts/k4run b/k4FWCore/scripts/k4run
index 3e1049d7..40e8df7c 100755
--- a/k4FWCore/scripts/k4run
+++ b/k4FWCore/scripts/k4run
@@ -6,6 +6,8 @@ import argparse
 from multiprocessing import cpu_count
 import logging
 
+from k4FWCore.utils import load_file
+
 # these default properties are filtered as otherwise they will clutter the argument list
 FILTER_GAUDI_PROPS = [
     "ContextService",
@@ -55,10 +57,6 @@ seen_files = set()
 option_db = {}
 
 
-def load_file(file):
-    exec(file.read(), {})
-
-
 def add_arguments(parser, app_mgr):
     # length increases when properties of an algorithm with tools are inspected
     # see https://github.com/key4hep/k4FWCore/pull/138